Feed collet



Patented Nov. 6, W23.

entree stares Ldiddlt rarer errata.

Antenna in. nearer, Lunwre r. rnrnas, arm nnwnnn ana'rnsaca, or MILWAUKEE,

Wisconsin. 7

FEED COLLEGE.

a lication filed march 28, 1922. Serial at. 547,465.

To all whom it may concern. Be it known that we, ARTHUR M. KRAMP, LUDWIG I Pr'rnns, and EDWARD J. RATH- SACK, citizens of the United States, residing at Milwaukee, in the county of Milwaukee vand State of Wisconsin, have invented certain new and useful Improvements in Feed Collets, of which the following is a specification.

lhis invention relates to feed collets or feed shells used for feeding bar stock in.

automatic or hand screw-machines and it consists 1n the novel construction .and oombination of the parts hereinafter fully de-- Figs. 4 and 5 are sections showing modifications in the forms of the s rings.

T he collet or shell has a cylindrical body portion 7 of spring metal, having a screwthreaded portion 8 at one end, and an enlargement 9 adjacent to the screwthreaded portion which forms a shoulder 10 where it joins on to it. The body portion 7 has a tircumferential groove 12 in its other end portion, and it has a tapering end portion 14 in front of the groove. Longitudinal slots 15 are formed in the "front and middle.

parts of the body portion in frontof the enlargement 9. 'lhese slots divide the main part of the body portion into three spring arms, and these spring arms have similar angle-shaped jaws 16 which project inwardly and grip the work. More than three spring arms may be provided, if. desired,

and the jaws 16 may be of any other approved form.

A spring ring 18 isforced over the ta pering parts 14, into the groove 12, and reinforces the spring arms. A single broad and flat spring ring 18 is used, but a series of similar narrow rings 19.1nay be used if desired, and they can be circular in crosssection as shown in Fig. 1, or square in cross-section as shown in Fig. 5. When a series of springs is used, one or more of the springs can be omitted to adjust the pressure. a

The feed collet is screwed into one end of the feed tube of the machine, and the bar of stock is fed through the feed tube, and is gripped by the.jaws of the spring arms which are re-inforcedby the spring ring or rings.

iVhat we claim is:

11A feed collet, comprising a tubular body having a screw-threaded portion at one end for securin it in place, said body having longitudina slits in its otherend portion which divide it into spring arms having tapering portions and jaws at their freeends, said arms having also an external. circumferential groove intermediate of their ends and behind their tapering portions, and a reinforcing spring for the said spring arms sprung over their said tapering portions into engagement with the said circumferential groove.

2. A. feed collet as set forth in claim 1 and provided with a series of separately removable spring rings for engaging with the said circumferential groove.

In testimony whereof we aiiix our signatures.

ARTHUR M. Karim. Limwie F. rarnas. EDWARD, J. RATHSACK. 

